Overlord, Tensei shitara Slime Datta Ken Recommendations
Both are isekai novels with an op protagonist with an inhuman body.
Both are Isekai, both are great geniuses, both seek to build a peaceful world, both are lords and evil kings, Both are about an incredibly strong man,
Both series feature powerful main characters who strive to build and lead their own unique communities. The exploration of world-building, diverse characters, and strategic elements in managing their newfound responsibilities creates a thematic similarity between the two series.